Answer:
To break a polygon into two pieces by defining a line, you need to select two points on the polygon to create the line of separation.
Here are the steps to select two points to define a line where the polygon will break into two pieces:
1. Identify the polygon: Determine the polygon you want to break into two pieces.
2. Select the first point: Choose a point on one side of the polygon where you want the line to start. This point will be one of the endpoints of the line.
3. Select the second point: Choose another point on the opposite side of the polygon where you want the line to end. This point will be the second endpoint of the line.
4. Draw the line: Draw a straight line connecting the two selected points. This line will divide the polygon into two separate pieces.
By selecting two points and drawing a line between them, you can effectively break the polygon into two distinct sections.